Meaning of the word "I'll eat my hat" in English

What does "I'll eat my hat" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

I'll eat my hat

US /aɪl iːt maɪ hæt/
UK /aɪl iːt maɪ hæt/
"I'll eat my hat" picture

Idiom

used to say that you will be very surprised if something happens, because you think it is impossible

Example:
If he actually finishes that project on time, I'll eat my hat!
You think she'll apologize? I'll eat my hat if she does!